Fix and improve TypeScript declaration

Now we can use helper functions like orm.ge, orm.like, ecc in Find
Now in TypeScript we can use find chain

Now it's possible to do thing like
```TypeScript
req.models["users"].find({ "counter": orm.lte(25) }).each((user) => {
console.log(user["counter"]);
});
req.models["users"].find({ "counter": orm.between(1, 205)
}).each().filter((user) => {
return (user["counter"] % 2) === 0;
}).count((num) => {
console.log("Users with counter between 1 and 205 and with even counter:
"+ num);
});
```
Merge pull request #369 from nerdzeu/master

Fix and improve TypeScript declaration